Clamp



./ NIOR,

JlHor J G. BLYTHE.

CLAMP.

(No Model.)

Patented June 29, 1886.

W ITA EIS'SES QM mvm/ linirrnn STATE Parent Urrrea GEORGE BLYTHE, OFOHILLIOOTHE, MISSOURI.

CLAMP.

SPECIFICATION forming part of Letters Patent No. 344,713, dated June 29,1886.

Application filed March 15, 188.

To (LZZ whom it may concern:

Be it known that I, GEORGE BLYTHE, a citizen of the United States, and aresident of Chillicothe, in the county ofLivingston and State of Missouri,have invented certain new and useful Improvements in Clamps; andI dohereby dcclare that the following is a full, clear, and exactdescription of the invention,which will enable others skilled in the artto which it appertains to make and use the same, reference beinghad tothe accompanying drawings, which form a part of this speoificatiomand inwhich-- Figure 1 is a perspective view of my improved clamp. Fig. 2 is avertical sectional view of the same. Fig. 3 is a front view of theclamp, showing the forward jaw removed. Fig. 4 is a perspective detailview of the front jaw with portions broken away, and Fig. 5 is a similarviewof the clamping-lever.

Similar letters of reference indicate corresponding parts in all thefigures.

Myinvention has relation to clamps having flat facing -jaws, suitablefor holding sawblades whilebeing filed,or for harness-niak ers use, orfor similar purposes; andit consists in the improved constructionand'combination of parts of the same, as hereinafter more fullydescribed and claimed.

In the accompanying drawings, the let'terA indicates the table, bench,block, or similar object, upon which the clamp is secured, an d thistable or block is formed with a perforation, B, having a series ofnotches, (J, in its edge. The frame of the clamp consists of a U-shapedupright, D, having its forward leg, E, shorter than its rear leg, F, andthe lower end of the upright is formed at the rear edge with twolaterally-projecting slottedlips,G G, into which fastening-screws H Hmay be inserted into the table, while a flat tongue, I, projects fromthe lower end, near the forward edge, having its lower end tiltedsomewhat forward, fitting into the perforation, andwith its forwardinclined edge into one of the notches in the edge of the perforation inthe table. A lip, J, projects from the front edge of the up right nearthelower end,and has its under side slightly inclined to one side, and awedge, K, may be inserted between this lip and the top of the table,forcing the forward side of the upright upward and causing the inclinedfront edge of the tongue to bear against the notch Serial No. 195,231.(No model.)

in the perforation, and to hold firmly'against the same. The upper endof the longer rear leg ofthe upright is provided with a head, L, theside edges of which are beveled toward the under side, and a plate,M,having a similarly shaped dovetailed groove, N,in its under side, fitsupon this head. The rear edge of this plate is formed with an upwardlyprojecting flange or lip, O, and the plate is provided with perforationsP I, for the insertion of screws Q, the upper threaded ends of which fitinto registeririg-perforations R in the under side of the rear andrigidjaw, S, ofthe clamp or vise. The beveled 0r dovetailed head uponthe rear leg of the upright tapers toward the forward end, and thegroove in thejaw-holding plate has a similar taper, so that the platemay be slipped upon the head from the front, and will be held when theforward end of the groove has reached the forward end of the head, beingheld more firmly, as the jaw and plate are subjected to pressure fromthe front edge. The upper end of the forward shorter leg of the uprightis provided with two laterallyprojecting studs, T T, and the plate U,which has the front jaw, V, secured to its inner face by means offastening screws *W, passing through the said plate, is formed with twodownwardly and forwardly projecting flat arms, X X, secured at theirupper ends to the jaw-holding plate, and having in their inner facesvertical grooves Y Y, the upper ends of which are rounded so as to formbearings,,and fitting with the rounded endsof the said ver tical groovesupon the studs projecting from the forward leg of the upright. Twohorizontal grooves, Z Z, extend in the inner faces of the arms from apoint at the lower ends of the vertical grooves toward the outer edgesof the arms, and two laterallyprojecting studs, A A, projecting from thecam-head B of the clamping-lever G, slide in these grooves and turn intheir outer rounded ends. The eccentric enlargement of the cam-head ofthe clamping-lever projects toward the inner edge of the same and bearsagainst the outer edge of the front leg of the upright, so that bydepressing the said lever the lower ends of the arms of the movable jawwill be tilted outward, causing thejaw at the upper ends of the saidarms to be forced against the rear rigid jaw, clamp ing any object whichmay be caught between thejaws. It will be seen that the upright may beheld firmly to the table by means of the screws, and the inclineddownwardly-projecting lip, bearing with its inclined edge against thenotch in .the perforation, being forced against it by the action of thewedge under the lip upon the forward edge of the upright, and on accountof the perforation in the table having a number of radiating notches,the

x jaws of the clamp may be placed at any desired angle to the edge ofthe table or bench for the purpose of obtaining the light thrown uponthe work at the desired angle, or for any other purpose.

The clamp may be taken apart and packed into a comparatively small spacewithout the necessity of removing or unfastening any screws or nuts,with the exception of the screws securing the slotted lips to the table,while otherwise the movable jaw may be slid off from the forward arm orleg of the upright, whereupon the clamping-lever may be slid out fromthe jaw, and the rear jaw and its holding-plate may be slid off from therear leg of the upright. After removing the jaws from the upright thescrews securing it to the table may be unscrewed with greater ease, andthe wedge knocked out from the lip, when the up. right may be removedfrom the table.

Jaws of different widths may be used upon the same upright, and if thejaws become damaged or worn out they may be removed from theirholding-plates and new jaws inserted, or

lever are notpivoted upon inserted bolts or pins, but are pivoted uponstuds integral with the upright and with the clamping-lever, or securelyfastened in them, which studs are not removable, but rock in the ends ofgrooves, by means of which the parts may be slid apart.

Having thus described my invention, 1 claim and desire to secure byLetters Patent of the United States- 1. An upright having at its upperend a pair of clamping-jaws and means for operating the same, providednear its lower end with an inclined lip and at its bottom with a tongueprojecting obliquely toward the side on which said lip is formed, incombination with a bench provided wit-h a hole having notches radiatingtherefrom for the reception of said tongue, and a securing-wedge.

2. An upright having at its upper end a pair of clamping-jaws and meansfor operating the same, provided on one edge, near its lower end, withan inclinedlip, on the sides with laterally-projecting slotted lips, andat its bottom with a tongue projecting obliquely toward the side onwhich said inclined lip is formed, in combination with a bench providedwith a hole for said tongue, anda securing-wedge.

3. A clamp consisting of a U-shaped upright provided with means forsecuring it in position, the upper end of one leg provided with atapering head having its sides beveled under, a plate having adovetailed tapering groove on its under side to receive said head, and aledge along one of its upper edges, ajawplate formed to fit upon and tobe secured to said plate, a movable jaw pivoted at the upper end of theother leg, and means for operating the movablejaw.

4. A clamp consisting of a U-shaped upright provided with means forsecuring it in position, a stationary jaw attached to one leg, a movablejaw pivoted upon the upper end of the other leg; and consisting of aplate having a jaw-plate secured to one side and a pair ofobliquely-projecting arms upon the other side, and a cam-headed leverpivoted between said arms.

5. A clamp consisting of a U-shaped upright provided with means forsecuring the same in position, one leg of the upright being longer thanthe other, a removable rigid jaw attached to the upper end of the longerleg, the shorter leg being provided near its upper end withlaterally-projectingstuds, a movable jaw provided with a pair ofobliquely-projecting flat arms having on the inner face of each GEORGEBLYTHE.

\Vit-nesses:

J NO. 1. SAILOR, JOHN G. PATTERSON.

